Schaller GrandTune Guitar Tuning Machine

The Schaller GrandTune combines refined vintage styling with precise open-gear tuning and velvety smooth performance. Built with an open gear and worm drive mechanism, it features a precise 1:18 gear ratio that delivers exceptional accuracy, durability, and tuning stability across a wide variety of stringed instruments.
Crafted without synthetic polymer coatings, the ultra-precise contact surfaces provide optimal slip-stick performance without wear or aging. Permanently locked, sealed screw joints ensure maintenance-free reliability, while countersunk screw holes provide firm mounting and resonant tonal transfer directly to the headstock.
Designed to fit standard production instrument dimensions for straightforward installation and replacement, each single unit includes mounting screws and a hexagonal press-in bushing for solid headstocks. Original Schaller GrandTune bushings guarantee exact gear alignment and long-lasting mechanical protection.
Brand
Schaller
Model
GrandTune Single (GT-Single)
Product Type
Guitar Tuning Machine
Gear Ratio
1:18
Configuration
Single Tuning Machine
Design
Open Gear
Mounting Type
Countersunk Screw Mount with Press-in Bushing
Bushing Outer Diameter
0.35 in
Bushing Inner Diameter
0.24 in
Included Hardware
2 mounting screws (M2.2 x 11), 1 hexagonal press-in bushing (for solid headstock versions)